Harness-controlling mechanism for looms



May 20, 1930. EDELSTEIN T A 1,759,047

HARNESS CONTROLLING MECHANISM FOR LOOMS Filed Se t. 7, 1 27 2 Sheets-Sheet 1 hue/710w.

May 20, 1930; A. EDELSTEIN ET AL 1,759,047

HARNESS CONTROLLING MECHANISM FOR LOOMS 2 Sheets-Sheet 2 Filed Sept. '7, 1927 Patented May 20, 1930 UNITED STATES PATE ARNOLD EDELSTEIN AND GEORG KIS, 0F BUDAPEST, HUNGARY HARNESS-CONTROLLING MECHANISM. FOR LOOMS Application filed September 7, 1927, Serial No. 217,912, and in Hungary September 7, 1926.

This invention relates to a harness controlling mechanism for looms and has for its object the provision of certain improvements in the mechanisms of this kind.

The present invention relates to dobbies or harness controlling devices of the type wherein catches are pivoted to curved parts mounted on a notched constantly-operating shaft and are controlled by pattern mechanism whereby selected catches can be moved into engagement with and thus locked to the notched shaft so that the corresponding curved parts are operated to actuate the corresponding harnesses.

According to the present invention cords for raising the harnesses are passed around the peripheries of intermittently rocking annular members. Further, according to the invention the notched shaft is oscillated about its axis by means of an excentric on a constantly-rotating shaft and the curved parts comprise rings or annular members connected by cords to the harnesses.

The invention is illustrated in the accompanying drawings, wherein Figs. 1 and 2 illustrate, diagrammatically, a cross section of a mechanically operated harness controlling mechanism, with the harness in the lowered and raised position, respectively.

Fig. 3 is a sectional side elevation of the same mechanism.

Fig. 4 shows'a modification in cross section.

Above the upper girder of the loom there is arranged in the longitudinal direction of the loom, that is, at right angles to the shafts of the harnesses, a shaft T Fig. l on which there is assembled a series of annular members or rings G, the number of which corresponds to the number of harnesses N to be lifted.

These rings and the shaft T form clutches, one part common to all, the shaft T being constantly rocked, and from time to time engagement takes place between it and the rings G, each of which is connected with its corresponding harness N. The shaft T has a rocking movement imparted thereto by means of an arm Y and an excentric X keyed on a constantly rotating shaft. This is a uniformly accelerated and retarded rocking movement, as it is derived from the excentric X.

A groove M is machined longitudinally into the shaft T, and on each ring G is provided a pivotally mounted pawl K1 adapted to co-operate with the groove M. A spiral spring WV normally tends to disengage the pawl K from the groove M, that is, to move it to a greater distance from the rocking shaft T. l

Opposite each of the pawls K each ring G has pivoted thereto an arc-shaped arm 0 provided with a blade spring F. When the coI1 stantly rotating member H brings a lag R, from which there projects a peg V, adjacent the arm C this peg presses the said arm towards shaft T so that the said arm 0 presses the pawl IQ by means of the spring F and against the action of the spiral spring W against shaft T. The pawl K subsequently engages with the groove M so' that the ring G is locked to the shaft T.

By reason of the engagement between the rocking shaft T and the corresponding ring G the shaft T will move the ring G therewith. A cord Z fixed on the circumference of the ring G leads to harness N, so that as the ring G is rocked in a clockwise direction from the position shown in Fig. 1 to the position shown in Fig. 2, the harness is raised by the cord Z from the position shown in dotted sis lines Fig. 2 to the position shown in full lines. 7

A spring U serves to return the harness to its original position.

Before the shaft, during its return movement, reaches the end of this movement a projection J on the ring G meets a fixed and accurately adjustable elastic stop J The latter prevents the ring G from continuing to accompany the shaft T during the last 3 to 4 mms. of its travel. During this por tion of the return movement the shaft moves alone. The spiral spring W is thus enabled to disengage the pawl K from the groove M. A stop E arranged in front of arm C limits the rocking movement of arm C and indirectly also that of the pawl K Fig. 4 shows a modification, in which the springs W and F are unnecessary, by reason of the shape and position of the pawl K and arm C J 3 denotes a modified form of stop. It is to be understood that the invention may be modified in various Ways Without departing from the scope of the invention.

' 5 We claim:

1. A harness controlling mechanism of the type described, comprising a notched operating shaft, a plurality of annular members mounted on said shaft, pivoted pawls on said membersadapted to engage in the notch of sald operating shaft, and means connected to said members for operating the harnesses.

2. A harness controlling mechanism of the type described, comprising an operating shaft, an eccentric member for oscillating said shaft, a plurality of annular members loosely mounted on said shaft and operatively connected to the harnesses and means adapted to selectively engage said members and cause participation thereof in the move ment of said shaft.

3. A harness controlling mechanism of the type described, comprising a constantly operating shaft, a plurality of annular members concentrically mounted on said shaft.

a plurality of adjustable stops, projections on said annular members adapted to cooperate With said stops whereby the movement of said annular members may be arrested be fore the movement of said shaft, and means connected to the peripheries of said annular members for raising and lowering the harnesses.

In testimony whereof We affix our signa- 'tures.

ARNOLD EDELSTEIN. GEORG KIS. 

